How can I set a UITableViewCell’s accessory color?

Actually the correct answer (despite it being so late) is to set your cell tintColor property to a white UIColor object, like so:

UITableViewCell *cell = [UITableViewCell new]; // or other instantiation...
[cell setTintColor:[UIColor whiteColor]];

Subclassing the accessory view entirely is also possible, but the question is asking to make the cell accessory button white, so this should be the correct answer (at least for iOS7).

Note: Corrected property name, also note that it doesn’t actually work for the indicator accessory type